- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 15/06 - Filling-up mechanically
Patent holdings for IPC class E21F 15/06
Total number of patents in this class: 33
10-year publication summary
|
2
|
2
|
2
|
6
|
3
|
1
|
6
|
5
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China University of Mining and Technology | 1308 |
15 |
| Strata Products Worldwide, LLC | 68 |
5 |
| Anhui University of Science and Technology | 197 |
2 |
| Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. | 3 |
1 |
| Jri Ingenieria S.A. | 2 |
1 |
| Shandong University | 1152 |
1 |
| Sika Technology AG | 3004 |
1 |
| Technische Universitat Bergakademie Freiberg | 109 |
1 |
| Noaq Flood Protection AB | 13 |
1 |
| Shandong Xinmei Machinery Equipment Co., Ltd | 1 |
1 |
| Wanbao Mining Ltd. | 8 |
1 |
| Xuzhou Zhongkuang Backfilling&mining Technology Co., Ltd | 7 |
1 |
| Drill Tech Drilling & Shoring, Inc. | 1 |
1 |
| Northern Engineering & Technology Corporation (dalian), MCC | 3 |
1 |
| Other owners | 0 |